Bidirectional self-clamping sealing intelligent sliding sleeve system and implementation method thereof

Abstract

The invention relates to the technical field of oilfield development, in particular to a bidirectional self-clamping sealing intelligent sliding system construction method. Comprising a plugging tool body, two setting structures coaxially arranged with the plugging tool body are arranged on the plugging tool body in a surrounding mode, the two setting structures are spaced, a driving mechanism is installed in the plugging tool body, and the driving mechanism can drive any setting structure to be expanded so as to protrude out of the plugging tool body. The plugging tool has a bidirectional clamping and sealing function, can prevent the influence of the detected oil / gas reservoir on the oil / gas reservoir under test in the construction process, ensures the accuracy of oil data of each section of tested oil reservoir, reduces the failure risk, and provides effective parameter support for subsequent construction.

Description

Technical Field

[0001] This invention relates to the field of oilfield development technology, and more specifically to a bidirectional self-locking sealing intelligent sliding sleeve system and its implementation method. Background Technology

[0002] As oil and gas exploration extends to deeper and more complex reservoirs, the characteristics of multiple overlapping oil- and gas-bearing sections and significant differences in interlayer properties are becoming increasingly prominent. Traditional combined-layer testing methods are prone to problems such as high-yield layers masking low-yield layers and water layers affecting gas layer evaluation due to severe interlayer interference. They also fail to accurately obtain key parameters such as production capacity, pressure, and fluid properties of individual sections, directly restricting the scientific validity of reserve calculations, production capacity predictions, and development plan formulation.

[0003] Deep exploration well fracturing must simultaneously meet the requirements of testing and fracturing operations. The tubing string experiences high friction and its pressure-bearing limit is close to that of surface equipment (e.g., fracturing in the Wenchang offshore block requires high-pressure integrated tubing strings). Furthermore, the risks of packer failure and sliding sleeve failure are significantly increased. If the sliding sleeve fails during operation, it will lead to interconnection of oil fluid in each reservoir layer, making it impossible to accurately test the reservoir fluid information for each segment. Summary of the Invention

[0004] This invention provides a bidirectional self-locking sealing intelligent sliding sleeve system and its implementation method, with the aim of improving the failure status of the sliding sleeve.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A sealing tool includes a sealing tool body, on which two setting structures are arranged coaxially with itself and spaced apart. A driving mechanism is installed inside the sealing tool body, which can drive either setting structure to expand and protrude from the sealing tool body.

[0007] The seat structure is an inflatable airbag, and the drive mechanism consists of two air pumps that inflate the two airbags respectively.

[0008] The sealing tool body is a rotating body. The outer surface of the sealing tool body is provided with two symmetrical conical surfaces. The diameter of the two conical surfaces gradually decreases on the side closer to each other. Two setting structures are fitted on the two conical surfaces. The driving mechanism includes a push sleeve fitted at the center of the sealing tool body and located between the two conical surfaces, and an actuator installed in the sealing tool body for driving the push sleeve to move left and right. The push sleeve is used to push the two setting structures to move in the direction of increasing conical diameter, so that the moving setting structures expand. After the setting structures expand, they can protrude radially out of the sealing tool body and the push sleeve.

[0009] A valve core, used by the sealing tool, has two expanding sections formed on its inner wall, and a reducing section between the two expanding sections, with two setting structures capable of setting on the two expanding sections.

[0010] The setting structure can be locked onto the reduced diameter section.

[0011] A sliding sleeve body for well testing includes a sliding sleeve body, a valve core slidably connected in an enlarged section of the sliding sleeve body, an overflow hole provided on the sliding sleeve body, the valve core being able to close the overflow hole, and the overflow hole opening when the valve core moves in an axial direction away from the overflow hole, and an identification module installed in the sliding sleeve body, the identification module being located on the side closer to the inlet of the sliding sleeve body than the overflow hole.

[0012] A bidirectional self-locking sealing intelligent sliding sleeve system includes a plugging tool, a valve core, and a test sliding sleeve body and valve core for well exploration. The plugging tool body is equipped with an electrical control module and a circuit module, both of which can identify the identification module. Both the electrical control module and the circuit module have counting functions and count quantity setting functions. The circuit module has a timing function. The circuit module and the electrical control module can adjust the expansion of the setting seal structure that enters the sliding sleeve body sequentially by controlling the drive mechanism.

[0013] When the electronic control module and the circuit module simultaneously detect the sliding sleeve marking module of the exploration well test, each detection of a marking module counts once until the set count is reached, the electronic control module controls the drive mechanism to expand the setting structure that enters the sliding sleeve body to set the valve core at the expansion section near the inlet of the sliding sleeve body. At the same time, the circuit module starts timing. When the timing reaches the set time, it controls another setting structure to expand to set the sliding sleeve body at another expansion section.

[0014] A method for implementing a bidirectional self-locking sealing intelligent sliding sleeve system includes the following steps:

[0015] Step 1: Before the plugging tool is lowered into the well, the electrical control module and circuit module are programmed to set the same target sliding sleeve count value. The circuit module is programmed with a timer value. When the plugging tool is lowered into the well, the electrical control module and circuit module simultaneously detect the sliding sleeve marking module of the exploration well. Each time a marking module is detected, it counts once until the set count value is reached. The electrical control module controls the drive mechanism to expand the setting structure that enters the sliding sleeve body to set the valve core at the expansion section near the inlet of the sliding sleeve body. At the same time, the circuit module starts timing. When the timer reaches the set value, it controls another setting structure to expand to set the sliding sleeve body at another expansion section.

[0016] The beneficial effects of the bidirectional self-locking sealing intelligent sliding sleeve system and its implementation method of the present invention are as follows:

[0017] To address the challenges raised in the background section, this invention proposes a stratified testing technology for oil and gas testing. Its core logic lies in employing a step-by-step stratified control mode: by combining downhole packers and switching tools, the target layer is opened sequentially from bottom to top or from top to bottom, while untested layers are effectively isolated, enabling independent testing of each layer under undisturbed conditions. This technology can accurately capture the true production potential of a single layer, clarify the oil and gas content and development value of each layer, and provide reliable data support for subsequent work such as reservoir stratified stimulation and optimization of syndicated production layers. It is a key technical means for efficient exploration and accurate evaluation of complex oil and gas reservoirs.

[0018] This method can replace the traditional process of setting the cable bridge plug. Since it eliminates the need for cable installation, it reduces the risk of cable breakage and ensures construction safety. It also significantly shortens the overall well construction time and reduces construction costs.

[0019] The sealing tool has a bidirectional locking and sealing function, which can prevent the tested oil reservoir from affecting the oil reservoir being tested during the construction process, ensure the accuracy of oil data for each section of the oil reservoir being tested, reduce the risk of failure, and provide effective parameter support for subsequent construction.

[0020] The exploratory well test sleeve can be closed according to real-time construction requirements. When it is necessary to close the exploratory well test sleeve corresponding to the tested oil reservoir, the pressure at the left end of the plugging tool is reduced by using the temporary plugging function of the plugging tool, thereby closing the exploratory well test sleeve. Attached Figure Description

[0021] Figure 1 A schematic diagram showing the initial state of the sealing tool;

[0022] Figure 2 A diagram showing the sealing tool in its fully open state;

[0023] Figure 3 This shows a schematic diagram of the internal structure of the sealing tool embodiment one in its initial state;

[0024] Figure 4 This shows a schematic diagram of the internal structure of Embodiment 1 of the sealing tool when it is opened on one side;

[0025] Figure 5 This shows a schematic diagram of the internal structure of Embodiment 1 of the sealing tool in the fully open state;

[0026] Figure 6 This shows a schematic diagram of the internal structure of the sealing tool in its initial state, according to Embodiment 2.

[0027] Figure 7 This shows a schematic diagram of the internal structure of the sealing tool embodiment two when it is opened on one side;

[0028] Figure 8 This shows a schematic diagram of the internal structure of the sealing tool in the fully open state, according to Embodiment 2.

[0029] Figure 9 The initial state diagram of the sliding sleeve during the well test is shown;

[0030] Figure 10 The diagram shows the opening status of the sliding sleeve during well testing.

[0031] Figure 11 The flowchart for activating the blocking tool is shown;

[0032] Figure 12 This diagram shows the plugging tool fully engaged and locked in the test sleeve of the exploration well.

[0033] Figure 13 A schematic diagram of coiled tubing perforation is shown;

[0034] Figure 14 A schematic diagram of the column diagram is shown;

[0035] Figure 15 This diagram shows the sealing tool set in the test sleeve of the exploration well;

[0036] Figure 16 A schematic diagram showing the opening of the exploratory well test sliding sleeve after the plugging tool has been set;

[0037] Figure 17 A schematic diagram of the boss is shown;

[0038] Figure 18 A schematic diagram showing the fit between the boss and the lower seat is displayed.

[0039] In the diagram: A1, First electrical control module; A2, Upper cone; A3, Upper setting seal; A4, Double push sleeve; A4-1, Upper push sleeve; A4-2, Lower push sleeve; A5, Lower setting seal; A6, Lower cone; A7, Second electrical control module; A8, End cap; a1, Rotating component; a2, Motor end cap; a3, Telescopic component; a4, Motor; b1, Gas generator; b2, Isolator; B1, Upper connector; B2, Identification module; B3, Protective sleeve; B4, Outer shell; B5, Valve core; B6, Elastic ferrule; B7, Lower connector; 1, Casing; 2, Coiled tubing; 3, Perforating tool; 4, Tubing string; 5, Exploration test sliding sleeve; 6, Packer. Detailed Implementation

[0040] A bidirectional self-locking sealing intelligent sliding sleeve system, comprising as follows Figure 1 and 2 The sealing tools shown and such Figure 9 and 10 The sliding sleeve shown is for well testing.

[0041] Among them, reference Figures 3 to 5 Example 1 of the sealing tool:

[0042] It includes a double-headed cone, which serves as the main structure of the sealing tool. A first electronic control module A1 is fixed inside the double-headed cone.

[0043] The double-ended cone comprises an upper cone A2, a lower cone A6, and two end caps A8. The first end cap A8 is threaded to the left end of the upper cone A2, and the lower cone A6 is threaded to the right end of the upper cone A2. The upper cone A2 and the lower cone A6 are connected to form a central channel. The second end cap A8 is threaded to the right end of the lower cone A6. An upper cavity is formed between the upper cone A2 and the aforementioned first end cap A8. The upper cone A2 is provided with an upper liquid permeation hole that communicates with the upper cavity. A lower cavity is formed between the lower cone A6 and the aforementioned second end cap A8. The lower cone A6 is provided with a lower liquid permeation hole that communicates with the lower cavity.

[0044] An electrically controlled valve is installed in both the upper and lower chambers. The electrically controlled valve in the upper chamber can open and close the upper liquid passage, and the electrically controlled valve in the lower chamber can open and close the lower liquid passage.

[0045] The electrically controlled valve includes a rotating component a1, a motor end cover a2, a telescopic component a3, and a motor a4.

[0046] The rotating component a1 and the telescopic component a3 combine to form a rotary-to-linear motion mechanism, which can be a gear and rack linear motion mechanism, a worm gear linear motion mechanism, or a lead screw and slider linear motion mechanism; the motor a4 is connected to the rotating component a1 through a transmission, providing rotational power to the rotating component a1, and the rotating component a1 rotates to drive the telescopic component a3 to perform linear motion; the linear displacement component a3 in the upper cavity is inserted into the upper liquid permeation hole, and the linear displacement component a3 in the lower cavity is inserted into the lower liquid permeation hole.

[0047] For example, in a gear and rack linear motion mechanism, the upper and lower liquid-permeable holes are collectively referred to as liquid-permeable holes. The rotating component a1 is a gear, which is fixed on the output shaft of the motor a4. The telescopic component a3 is a rack, which is slidably connected inside the double-headed cone and can only move linearly. When the end of the rack is inserted, the liquid-permeable hole is blocked; when the rack retracts and disengages from the liquid-permeable hole, the liquid-permeable hole opens.

[0048] Motor a4 is a miniature geared motor, which is fixed to the motor end cover a2 by a pin. The motor end cover a2 is connected to the upper cone A2 by a threaded connection. The two motors a4 are respectively inserted into the central cavities of the upper cone A2 and the lower cone A6.

[0049] The sealing tool also includes an upper setting body A3, a double push sleeve A4, a lower setting body A5, and a lower cone A6. The outer wall surface of the upper cone A2 is provided with a guide cone surface, the outer diameter of which gradually decreases towards the lower cone A6. Similarly, the outer wall surface of the lower cone A6 is also provided with a guide cone surface, the outer diameter of which gradually decreases towards the upper cone A2. The upper setting body A3 is fitted onto the guide cone surface of the upper cone A2, and the lower setting body A5 is fitted onto the guide cone surface of the lower cone A6.

[0050] The upper cone A2 and the lower cone A6 have reduced outer diameter sections. At these reduced diameter sections, the upper cone A2 and the lower cone A6 can have equal outer diameters or be nested. For example, the lower cone A6 is fitted onto the upper cone A2, with the end face of the lower cone A6 abutting against the upper cone A2. The double push sleeve A4 includes an upper push sleeve A4-1 and a lower push sleeve A4-2, which are slidably and sealingly connected to the lower cone A6. The upper push sleeve A4-1 and the upper cone A2 form an upper storage cavity, which is connected to a liquid permeation hole on the upper cone A2. The lower push sleeve A4-2 and the lower cone A6 form a lower storage cavity, which is connected to a liquid permeation hole on the lower cone A6. The first electrical control module A1 is located between the two motors a4 and is electrically connected to both motors a4. The two motor end caps a2 seal the central cavities of the upper cone A2 and the lower cone A6.

[0051] Working Principle: In the initial state, the upper pusher sleeve A4-1 rests against the lower pusher sleeve A4-2. Both the upper and lower storage chambers contain liquid, keeping the upper pusher sleeve A4-1 and the lower pusher sleeve A4-2 converged at the center of the double-headed cone. At this time, the upper setting body A3 and the lower setting body A5 do not protrude radially from the double-headed cone. After detecting the target well test sleeve, the first electrical control module A1 controls the motor a4 in the upper cavity to retract the telescopic component a3. At this time, the retracting component a3 in the upper fluid permeation hole will disengage from the upper fluid permeation hole of the upper cone A2. At this time, the upper storage chamber, the upper fluid permeation hole, and the upper cavity are connected. Therefore, the liquid stored in the upper storage chamber will flow into the upper cavity. Under the pressure inside the tubing string 4, the upper pusher sleeve A4-1 will move towards the upper setting body A3 to apply axial thrust to the upper setting body A3. Under the action of the guide cone surface of the upper cone A2, the upper setting body A3 expands radially and sets on the left side of the valve core B5. After the left side is set, the lower pusher sleeve A4-2 maintains pressure balance between the left and right cavities under downhole pressure, keeping its position unchanged. Similarly, the first electrical control module A1 controls the motor a4 in the lower cavity, causing the telescopic component a3 to retract and disengage from the lower fluid inlet. At this time, the lower storage cavity, the lower fluid inlet, and the lower cavity are connected, and the liquid stored in the lower storage cavity will flow into the lower cavity. This disrupts the pressure balance between the left and right cavities inside the pusher sleeve A4-2, making the pressure on the left cavity greater than that on the right, causing the lower pusher sleeve A4-2 to move to the right. In the same way, the lower setting body A5 expands and sets on the right side of the valve core B5.

[0052] refer to Figures 6 to 8 Example 2 of the sealing tool:

[0053] Based on Embodiment 1, a gas generator b1 is used as the power source, eliminating the need for an electronically controlled valve and a liquid inlet. The upper cone A2 and its connected end cap A8 can be a single integrated structure, referred to as the upper conductor; similarly, the lower cone A6 and its connected end cap A8 are also a single integrated structure, referred to as the lower conductor. An installation cavity is formed between the upper push sleeve A4-1, the lower push sleeve A4-2, and the lower cone A6. An isolator b2 is disposed within the installation cavity and threadedly connected to the lower cone A6, dividing the installation cavity into an upper installation cavity and a lower installation cavity. One gas generator b1 is installed in each of the upper and lower installation cavities, and both gas generators b1 are electrically connected to the first electronic control module A1. The lower cone A6 has two mounting holes, and the two gas generators b1 are threadedly connected to the two mounting holes respectively.

[0054] Working principle:

[0055] Initially, both the upper push sleeve A4-1 and the lower push sleeve A4-2 are pressed against the isolator b2. Both the upper and lower storage chambers have a certain pressure, keeping the upper push sleeve A4-1 and lower push sleeve A4-2 centered on the double-ended cone. At this time, the upper setting body A3 and lower setting body A5 do not protrude radially from the double-ended cone. After detecting the target well test sleeve, the first electrical control module A1 controls the upper installation chamber gas generator b1 to release high-pressure gas. This causes a sharp increase in the chamber pressure within the upper installation chamber, exceeding the pressure within the upper storage chamber. Under the pressure difference, the upper push sleeve A4-1 moves towards the upper setting body A3 to apply axial thrust to it. The upper setting body A3, guided by the upper cone A2, radially expands and sets on the left side of the valve core B5. After the upper setting body A3 is set, the first electronic control module A1 controls the lower mounting chamber gas generator b1 to expand the lower setting body A5 and set it on the right side of the valve core B5 in the same way.

[0056] Among them, reference Figure 9 and 10 The well testing slide sleeve includes the well testing slide sleeve body and valve core B5.

[0057] The exploratory well testing sliding sleeve body includes an upper connector B1, an identification module B2, a protective sleeve B3, an outer shell B4, a valve core B5, an elastic ferrule B6, and a lower connector B7. The internal thread of the upper connector B1 engages with the external thread of the tubing string 4 to achieve a threaded connection, allowing the tubing string 4 to be lowered to the ground. The identification module B2, located inside the exploratory well testing sliding sleeve body, provides an identification signal for the plugging tool. The outer shell B4 is threaded to the right side of the inner wall of the upper connector B1, while the protective sleeve B3 is inserted and secured between the outer shell B4 and the upper connector B1. The reduced-diameter section of the left outer wall of the protective sleeve B3 is close to the shoulder of the upper connector B1, forming a sealed cavity between the protective sleeve B3 and the upper connector B1. The identification module B2 is located within this sealed cavity, and the protective sleeve B3 protects the identification module B2 from well fluid erosion during operation. The outer shell B4 has flow holes evenly distributed around its own axis, located to the right of the upper connector B1. The inner wall of the outer casing B4 has two annular first retaining grooves, one on the left and one on the right, located on the right side of the flow hole, for locking the valve core B5. The inner wall of the right side of the outer casing B4 is threadedly connected to the lower connector B7.

[0058] The valve core B5 has an annular second groove on its outer wall. An elastic sleeve B6, shaped like an arch, is embedded in this second groove. The elastic sleeve B6 has a radially outward protrusion with chamfered ends. When axially compressed, the chamfered ends provide a radial force that causes the elastic sleeve B6 to contract towards the second groove. Initially, the protrusion is locked in the first groove on the left side, at which point the valve core B5 acts as a seal for the flow orifice on the outer casing B4. When the flow orifice opens, the valve core B5 requires a certain force to move to the right after the sealing tool has set it. That is, during operation, the valve core B5 is pushed to the right by the sealing tool, causing the elastic sleeve B6 to radially deform and retract into the second groove, thus opening the flow orifice. After the flow orifice is fully open, the protrusion of the elastic sleeve B6 moves away from the first groove on the left side and locks in the first groove on the right side. When the sliding sleeve closes, the elastic sleeve B6 returns from the second groove to the first groove. The function of the lower connector B7 is to connect to the pipe column 4 via the external thread located on the right side.

[0059] Where necessary, insert sealing rings at the sealing points.

[0060] refer to Figure 11Before the plugging tool is lowered into the well, the first electrical control module A1 is programmed to set the same target sliding sleeve count "value". The first electrical control module A1 also needs to set a timing program and set a time "value". When the plugging tool is lowered into the well, the first electrical control module A1 detects the exploration well test sliding sleeve marking module B2. Each time a marking module B2 is detected, the count is "+1" until the set "value" is reached. The first electrical control module A1 controls the left setting mechanism of the plugging tool to move. The push sleeve A4 moves to the left and applies an opening force to the upper setting body A3. Under the dual action of the upper cone A2 and the push sleeve A4, the upper setting body A3 expands and sets at the first expansion point on the left side of the exploration well test sliding sleeve valve core B5. At the same time, the first electronic control module A1 starts timing. When the count reaches the set value, the first electronic control module A1 controls the right setting mechanism of the plugging tool to move. The push sleeve A4 moves to the right to apply an opening force to the lower setting body A5. Under the dual action of the lower cone A6 and the push sleeve A4, the lower setting body A5 expands and sets at the second expansion point on the left side of the sliding sleeve valve core B5 in the exploration well test.

[0061] refer to Figures 12 to 18 The implementation method of the above-mentioned bidirectional self-locking sealing intelligent sliding sleeve system is as follows:

[0062] Step 1: After drilling is completed, first run casing 1 into the well;

[0063] Step 2: Use coiled tubing 2 to carry perforating tool 3 to perform perforation operation in the target oil reservoir, and perforate casing 1;

[0064] Step 3: Based on the design of the exploratory well test sleeve 5 according to the oil reservoir to be tested, connect the exploratory well test sleeve to the tubing string 4 and lower it to the target position. Use packers 6 to seal and separate different reservoirs.

[0065] Step 4: Before the plugging tool is lowered into the well, the programs for the first electrical control module A1 and the second electrical control module A7, which is located inside the double-headed cone, are set. The same target sliding sleeve count "value" is set. The second electrical control module A7 also needs to set a timing program and a time "value". When the plugging tool is lowered into the well, the first electrical control module A1 and the second electrical control module A7 simultaneously detect the exploration well test sliding sleeve marking module B2. Each time a marking module B2 is detected, the count "+1" is incremented until the set "value" is reached. The first electrical control module A1 controls the movement of the left setting mechanism of the plugging tool. The push sleeve A4 moves to the left and applies an opening force to the upper setting body A3. Under the dual action of the upper cone A2 and the push sleeve A4, the upper setting body A3 expands and sets on the first expansion section on the left side of the exploration well test sliding sleeve valve core B5. The upper setting body A3 is stuck on the left shoulder. At the same time, the second electronic control module A7 starts timing. When the count reaches the set value, the second electronic control module A7 detects the well test sliding sleeve signal and controls the right side of the sealing tool to move. The push sleeve A4 moves to the left to apply an opening force to the lower sealing body A5. Under the dual action of the lower cone A6 and the push sleeve A4, the lower sealing body A5 expands and sets at the second expansion section on the left side of the well test sliding sleeve valve core B5. The section between the first and second expansion sections is the reduction section, and a shoulder is generated between any expansion section and the reduction section.

[0066] Combined with appendix Figure 17 and 18 A boss is fixed to the right side of the inner wall of the sliding sleeve valve core B5, that is, the side away from the inlet of the sliding sleeve valve core B5, which reduces the inner diameter of the sliding sleeve valve core B5. If the point where the upper seat seal A3 and the sliding sleeve valve core B5 are locked is defined as the minimum inner diameter of the sliding sleeve valve core B5, the inner diameter of the boss is not less than the minimum inner diameter of the sliding sleeve valve core B5. When the upper seat seal A3 is not expanded, the lower seat seal A5 can also be locked on this boss. At this time, the upper seat seal A3 is at the reduced diameter section of the sliding sleeve valve core B5, thereby pushing the sliding sleeve valve core B5 to open the sliding sleeve.

[0067] Step 5: The ground pressurization equipment injects fluid into the tubing string 4. Since the plugging tool is set in the exploration well test sleeve 5, the pressure on the left side of the tubing string will be greater than that on the right side. The valve core B5 tends to move to the right. When the pressure rises to a certain value, the valve core B5 will move to the right and open the exploration well test sleeve under the action of the cross-sectional area.

[0068] Step Six: After opening the sliding sleeve of the exploratory well for testing, the segmented oil and gas testing operations can be carried out after the corresponding oil reservoir is fracturing. Then, the above process is repeated to complete the construction operation of the entire well.

[0069] Step 7: If it is necessary to close the previously measured oil reservoir during the construction of the entire well, the temporary plugging function of the plugging tool can be used to reduce the pressure at the left end of the plugging tool. This will cause the valve core B5 to move to the left and close the exploratory well test sleeve.

Claims

1. A sealing tool, comprising a sealing tool body, characterized in that, The sealing tool body has two setting structures arranged coaxially with itself, and the two setting structures are spaced apart. A drive mechanism is installed inside the sealing tool body, which can drive either setting structure to expand and protrude from the sealing tool body.

2. The sealing tool according to claim 1, characterized in that, The seat structure is an inflatable airbag, and the drive mechanism consists of two air pumps that inflate the two airbags respectively.

3. The sealing tool according to claim 1, characterized in that, The sealing tool body is a rotating body. The outer surface of the sealing tool body is provided with two symmetrical conical surfaces. The diameter of the two conical surfaces gradually decreases on the side closer to each other. Two setting structures are fitted on the two conical surfaces. The driving mechanism includes a push sleeve fitted at the center of the sealing tool body and located between the two conical surfaces, and an actuator installed in the sealing tool body for driving the push sleeve to move left and right. The push sleeve is used to push the two setting structures to move in the direction of increasing conical diameter, so that the moving setting structures expand. After the setting structures expand, they can protrude radially out of the sealing tool body and the push sleeve.

4. A valve core, characterized in that, When used in conjunction with the sealing tool according to any one of claims 1 to 3, the inner wall of the valve core is formed with two expanding sections and a reducing section between the two expanding sections, and the two setting structures are capable of setting on the two expanding sections.

5. The valve core according to claim 4, wherein the setting structure can be engaged on the reduced diameter section.

6. A sliding sleeve body for well testing, characterized in that, When used with the valve core as described in claim 5, the valve core is slidably connected in an expanded diameter section of the sliding sleeve body. The sliding sleeve body is provided with a flow hole. The valve core can close the flow hole. When the valve core moves in an axial direction away from the flow hole, the flow hole opens. An identification module is installed in the sliding sleeve body. The identification module is located on the side closer to the inlet of the sliding sleeve body than the flow hole.

7. A bidirectional self-locking sealing intelligent sliding sleeve system, characterized in that, The device includes a plugging tool, a valve core, and a test well slide sleeve body and valve core. The plugging tool body is equipped with an electrical control module and a circuit module that can identify the identification module. Both the electrical control module and the circuit module have counting functions and count quantity setting functions. The circuit module has a timing function. The circuit module and the electrical control module can adjust the expansion of the setting seal structure that enters the slide sleeve body sequentially by controlling the drive mechanism.

8. In the bidirectional self-locking sealing intelligent sliding sleeve system according to claim 7, when the electrical control module and the circuit module simultaneously detect the sliding sleeve marking module of the exploration well test, each marking module is counted once until the set count is reached, the electrical control module controls the drive mechanism to expand the setting structure that enters the sliding sleeve body to set the valve core at the expansion section near the inlet of the sliding sleeve body. At the same time, the circuit module starts timing, and when the timing reaches the set time, it controls another setting structure to expand to set the sliding sleeve body at another expansion section.

9. A method for implementing a bidirectional self-locking sealing intelligent sliding sleeve system, characterized in that... The bidirectional self-locking sealing intelligent sliding sleeve system described in claim 7 is implemented by including the following steps: Step 1: Before the plugging tool is lowered into the well, the electrical control module and circuit module are programmed to set the same target sliding sleeve count value. The circuit module is programmed with a timer value. When the plugging tool is lowered into the well, the electrical control module and circuit module simultaneously detect the sliding sleeve marking module of the exploration well. Each time a marking module is detected, it counts once until the set count value is reached. The electrical control module controls the drive mechanism to expand the setting structure that enters the sliding sleeve body to set the valve core at the expansion section near the inlet of the sliding sleeve body. At the same time, the circuit module starts timing. When the timer reaches the set value, it controls another setting structure to expand to set the sliding sleeve body at another expansion section.

10. The implementation method of the bidirectional self-locking sealing intelligent sliding sleeve system according to claim 9, wherein a boss is fixedly connected to the side of the sliding sleeve valve core away from its own inlet, the inner diameter of the boss is not less than the minimum inner diameter of the sliding sleeve valve core, and the lower seat seal body can be locked on this boss.

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